When your instructor came to your house, she was approaching straight at you on a very fast-moving car and was frantically making a monotone sound with a pipe with one open end and one closed end, whose length was 0.67 m. According to her text message, she was making the 7th harmonic. But to you, it sounded like the sound was in its 9th harmonic. How fast was she moving? Use 343 m/s for the speed of sound. O 76 m/s 0 440 m/s 270 m/s 098 m/s

Answer:

the percentage we have the fraction between the error and the magnitude,

Explanation:

When absolute error is used, it is a value that remains constant regardless of the magnitude of the measurement, for large measurements it can represent great accuracy, but for small measurements the accuracy may be low, for example> if we use a tape measure with error of Dx = 0.1 cm if the measurement is 1 meter this error is acceptable, but if the measurement is 1 cm the error is too big.

When we use the percentage we have the fraction between the error and the magnitude, so if this relationship is small the measure is very tight and but if the relationship is high the measure has little pressure, for example

           Δx = 1 cm = 0.01 m

          % = 0.01 / 1   100 = 1%

          % = 0.01 / 0.01 100 = 100%

therefore the precision of the measurement is known the percentage error

Answer:

elements

not really an explanation

Answer:

If you double the mass of an object, you double the kinetic energy. If you double the speed of an object, the kinetic energy increases by four times. Kinetic energy can be passed from one object to another in the form of a collision....What happen to the kinetic energy of its velocity become double ? The energy possessed by a body because of its motion, equal to one half the mass of the body times the square of its speed is called its kinetic energy. Hence, when velocity is doubled, kinetic energy becomes 4 times.

Explanation:

Answer: It increases by four times

Explanation: If you double the mass of an object, you double the kinetic energy. If you double the speed of an object, the kinetic energy increases by four times. Kinetic energy can be passed from one object to another in the form of a collision.

2000 mm is equivalent to 2 m. This can be derived from the fact that 1 m = 1000 mm. Thus, 2000 mm would be equal to 2 m since it is twice the length of 1000 mm. This conversion is important in various fields such as construction, engineering, and science where precision is necessary.

It is crucial to be able to convert between different units of measurement in order to make accurate calculations and measurements.The millimeter is a unit of length that is often used to measure small distances such as the thickness of a sheet of paper or the size of a small component. It is part of the metric system, which is a system of units used across the world that is based on multiples of 10.

This system makes it easy to convert between different units since it is based on a consistent set of rules.For example, to convert 2000 mm to meters, we can simply divide by 1000 since there are 1000 millimeters in a meter. This gives us 2 meters, which is the equivalent length in meters of 2000 millimeters.

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A typical shooting star in a meteor shower is caused by a meteor entering Earth's atmosphere.

A shooting star, also known as a meteor, is caused by a small piece of interplanetary debris, called a meteoroid, entering the Earth's atmosphere at high speed. As the meteoroid enters the atmosphere, it rapidly compresses the air in front of it, creating a shock wave that heats up the meteoroid and the surrounding air.

This produces a bright, glowing trail of ionized gas, which we see as a shooting star. Most meteoroids burn up completely in the atmosphere due to the extreme heat generated by friction with the air molecules. However, if a large enough meteoroid survives atmospheric entry and reaches the ground, it is then called a meteorite. Meteor showers occur when the Earth passes through the debris trail left by a comet or asteroid.

Thus, a typical shooting star in a meteor shower is caused by a meteor entering Earth's atmosphere.

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The equilibrium height h will the wire cd rise, assuming that the magnetic force on it is due entirely to the current in the wire ab is h = (μ0 × I² × λ) / (4 × π × g).

The magnetic force acting on wire CD due to the current in wire AB causes it to rise. The equilibrium height of wire CD is determined by balancing the magnetic force acting upward with the gravitational force acting downward.

The magnetic force is given by F = μ0 × I1 × I2 × L / (2 × π × r), where μ0 is the permeability of free space, I1 and I2 are the currents in wires AB and CD respectively, L is the length of wire CD, and r is the distance between the wires.

Since the currents in wires AB and CD are equal and opposite, we have I1 = -I2. Substituting this into the above equation and solving for L, we get L = (μ0 × I² × λ) / (2 × π × g), where λ is the mass per unit length of wire CD and g is the acceleration due to gravity.

The equilibrium height of wire CD is then h = L / 2, since the center of mass of wire CD rises to the midpoint of its length when it is in equilibrium. Thus, we have h = (μ0 × I² × λ) / (4 × π × g).

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The question is -

A long, horizontal wire AB rests on the surface of a table and carries a current I. Horizontal wire CD is vertically above wire AB and is free to slide up and down on the two vertical metal guides C and D (the figure ). Wire CD is connected through the sliding contacts to another wire that also carries a current I, opposite in direction to the current in wire AB. The mass per unit length of the wire CD is λ. To what equilibrium height (h) will the wire CD rise, assuming that the magnetic force on it is due entirely to the current in the wire AB? (Express your answer in terms of the variables I, λ, and appropriate constants (μ0,π, g))

Based on Einstein's theory of gravity, if the sun and its mass were to suddenly disappear, earth would stay in its current orbit for a few minutes before taking off into space.

The Earth would be drawn to a new center of gravity if the sun disappeared. Earth's gravity would change, as would that of the rest of the solar system, and Earth would begin to drift into space since there would no longer be a steady source of energy from the sun. It is a foolish dream to think that life could exist without the sun forever. Humans could be able to survive for a while in some sort of base, such as a nuclear-powered dome.

The good news is that there wouldn't be many living things for the radioactive waste to endanger; however, there also probably wouldn't be any liquid water to cool the power system. All photosynthetic species, including plants and algae, would die if just the sun's light persisted.

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Answer:

1.97 * 10^8 m/s

Explanation:

Given that:

n = 1.52

Recall : speed of light (c) = 3 * 10^8 m/s

Speed (v) of light in glass:

v = speed of light / n

v = (3 * 10^8) / 1.52

v = 1.9736 * 10^8

Hence, speed of light in glass :

v = 1.97 * 10^8 m/s

a.  The force on the 113 cm side is 0N. b. The force on the 50.0 cm side is 0.120N. c. The 101 cm side force is 0.234N . d. The magnitude of the net force on the loop is 0.354 N

The magnitude of the magnetic force on each side of the loop can be determined using the formula F = I * L * B * sin(θ), where I is the current, L is the length of the side, B is the magnetic field magnitude, and θ is the angle between the magnetic field and the side of the loop. The net force on the loop can be obtained by summing the individual forces acting on each side.

(a) To calculate the magnitude of the magnetic force on the 113 cm side, we use the formula F = I * L * B * sin(θ). The current (I) is 3.66 A, the length (L) is 113 cm, the magnetic field magnitude (B) is 65.9 mT (converted to Tesla by dividing by 1000), and the angle (θ) is 0 degrees since the magnetic field is parallel to this side. Therefore, the force on the 113 cm side is F = 3.66 * 1.13 * 0.0659 * sin(0°) = 0 N.

(b) Similarly, for the 50.0 cm side, the force can be calculated using the same formula, but the length is 50.0 cm and the angle θ is 90 degrees since the magnetic field is perpendicular to this side. Thus, the force on the 50.0 cm side is F = 3.66 * 0.5 * 0.0659 * sin(90°) = 0.120 N.

(c) For the 101 cm side, the angle θ is also 90 degrees, so the force is F = 3.66 * 1.01 * 0.0659 * sin(90°) = 0.234 N.

(d) To find the net force on the loop, we sum the individual forces: 0 + 0.120 + 0.234 = 0.354 N.

Therefore, the magnitude of the net force on the loop is 0.354 N.

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Answer:

11.1

Explanation:

2 hours 15 mins = 2 1/4 hours

2 1/4 hours = 25 miles

1 hour = 25 ÷ 2 1/4 = 25 ÷ 9/4 = 25 x 4/9 = 11.1 miles

High-mass stars have much shorter lifetimes than low-mass stars.

This is due to the fact that the internal structure and energy generating mechanisms of high-mass stars differ fundamentally from those of low-mass stars. Since high-mass stars have significantly greater gravitational pressure, they consume their nuclear fuel far quicker than low-mass stars. As a result, the lives of high-mass stars are substantially shorter.

A star 20 times the mass of our Sun, for example, may barely exist for a few million years, but a star 0.2 times the mass of our Sun may live for tens or even hundreds of billions of years.

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The radiation belts around Jupiter are much stronger than those found around Earth because: d) Jupiter has a stronger magnetic field than Earth.

Jupiter possesses a significantly stronger magnetic field compared to Earth, which contributes to the intensification of its radiation belts. The planet's powerful magnetic field interacts with charged particles from various sources, such as the solar wind and its own volcanic moon Io, trapping and accelerating them. These charged particles become trapped in the magnetic field, forming the radiation belts.

The combination of Jupiter's strong magnetic field and its interaction with energetic particles results in the generation of highly energetic radiation belts around the planet. These belts are composed of charged particles, including electrons and ions, that are accelerated to high speeds within Jupiter's magnetic field. This makes Jupiter's radiation belts much more intense than those found around Earth.

Factors such as larger storms, colder temperatures, or faster rotation do not directly contribute to the strength of Jupiter's radiation belts. It is primarily the planet's robust magnetic field that accounts for the enhanced intensity of its radiation belts.

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Answer:

360 degrees is one full rotation starting at zero

it take 2 s  to the flag to rotate once in a full circle  with 3 rad/s of angular velocity.

Angular velocity is "rate of change of angular displacement with respect to time". i.e. ω= dθ/dt. it is also defined as angular displacement over time. i.e. ω = angular displacement/Time.

Angular velocity shows how much angle can be covered in unit time. It's SI unit rad/s.

Angular acceleration is rate of change of Angular velocity with respect to time.

i.e. α = dω/dt if an object changes its angular velocity in short time, we can say that it has greater angular acceleration. It is expressed in rad/s².

In this problem we have to calculate time, but the angular velocity id not given.

Consider the angular velocity is 3 rad/s.

Given,

Angular displacement θ = 2π

angular velocity ω = 3 rad/s

Time t = ?

Time = θ/ω

Time = 2π/3 rad/s = 2 s

Hence the answer is 2s.

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Answer:

As the centripetal force acts upon an object moving in a circle at constant speed, the force always acts inward as the velocity of the object is directed tangent to the circle. ... In fact, whenever the unbalanced centripetal force acts perpendicular to the direction of motion, the speed of the object will remain constant.

Answer: False

Explanation: I took the quiz lol

The painter can stand no closer than 9.19 times the length of the board from the end of the board without tipping it over.

The weight of the painter acts downward at a distance of x/2 from the center of the board, and the weight of the board itself acts downward at a distance of L/2 from the center of the board.

The torque due to the weight of the painter is given by:

Tpainter = (mg)(x/2)

The torque due to the weight of the board is given by:

Tboard = (Mg)(L/2)

For the board to be in rotational equilibrium, these two torques must balance each other, so we have:

Tpainter = Tboard

Substituting the expressions for the torques and solving for x, we get:

(mg)(x/2) = (Mg)(L/2)

x = (ML)/m

Substituting the given values, we get:

x = (25 kg) (L)/ (68 kg)

x = 9.19 L

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Answer is A 2.8 x 10^-8 N, to the right

The net gravitational force on mass A due to masses B and C is required.

The correct option is a. \(2.8\times 10^{-8}\ \text{N}\) to the right.

G = Gravitational constant = \(6.674\times 10^{-11}\ \text{Nm}^2/\text{kg}^2\)

\(r_{AB}\) = Distance between A and B = 0.4+0.1 = 0.5 m

\(r_{AC}\) = Distance between A and C = 0.1 m

\(m_A=m_B=m_c\) = Mass of each particle = 2 kg

The required force is

\(F_A=F_{AB}+F_{AC}\\ =\dfrac{Gm_Am_B}{r_{AB}^2}+\dfrac{Gm_Am_C}{r_{AC}^2}\\ =Gm^2\left(\dfrac{1}{r_{AB}^2}+\dfrac{1}{r_{AC}^2}\right)\\ =6.674\times 10^{-11}\times 2^2\left(\dfrac{1}{0.5^2}+\dfrac{1}{0.1^2}\right)\\ =2.8\times 10^{-8}\ \text{N}\)

The magnitude of force will be \(2.8\times 10^{-8}\ \text{N}\)

The direction will be towards the right since C is closer to A.

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Answer:

there are just a bit over 1.6 km in a mile so 7.5*1.6=12. something so there is just a little bit more distance in 7.5 miles

Explanation:

Answer: 60

Explanation: if u hit it it will have impact and the impact added 10n

Answer:

The correct answer is B.

The astronaut will know due to the light from the explosion.

Explanation:

Sound and vibrations require a medium such as air to travel through. Space, there is no air. Only a vacuum. So sound and vibrations are unable to travel. Light requires no medium to travel. It can go through a vacuum.  

Therefore the Astronaut will see a bright flash of light as it travels from the explosion to outer space. It is also important to note that light can travel very far because nothing else interacts with its wave particles and as such, it cannot be impeded.

Cheers!

Answer: D

Explanation: I have my answers VS. Go0gle answers (go0gle answers are pics)

(A) Both have the same day length. Well, Venus doesn't havve the same amount of days. (I already know off the top of my head, but I still searched it up)

(B) Both rotate in the same direction. In school (before Virus) they would always show diagrams of the planets on the projector and Venus doesn't rotate

(C) Both have ample water. No. Venus doesn't have much water >_>

(D) Both have a solid inner core and a liquid outer core. Yesh. In my lessons (before), Venus has a solid inner core and liquid outer core.

2. change the amount of electric current

The experiment was conducted in my toilet wash hand sink with a bar soap 30 centimeter away from the faucet, the number of drips record per minute is 120 drips

Data

Calculation for the number of drips per minute

= 20*6

= 120 drips

What is Control Experiment

Control  experiment are carried out to minimize the effects of variables other than the independent variable

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Answer:

1. Tienes 1 kg de fruta.

2. Queda por recorrer 1/4 km.

3. Ambos pesan lo mismo.

Explanation:

1. Tienes 1/2 kg y cuando te doy 1/4 te queda:

\( m = \frac{1}{2} - \frac{1}{4} = \frac{1}{4} \)

Ahora cuando te doy 3/4 kg te queda en total:

\( m_{T} = \frac{1}{4} + \frac{3}{4} = 1 kg \)

Por lo tanto, tienes 1 kg de fruta al final.

2. Si falta por recorrer la mitad de la mitad, tenemos:

\( d = \frac{1/2}{2} = \frac{1}{4} \)

Entonces, queda por recorrer 1/4 km.

3. El peso (P) del hierro es:

\( P = m*g \)    

\( P = (1 + 1/2)kg*9.81 m/s^{2} = 14.72 N \)

Y el peso de la paja es:

\( P = 3/2 kg*9.81 m/s^{2} = 14.72 N \)

Por lo tanto, ambos pesan lo mismo.

Espero que te sea de utilidad!

Answer: the kinetic energy is equal to 125 Joules, or (1/2 * 10 kg) * 5 m/s2.

Explanation:

if a an object with a mass of 10 kg (m = 10 kg) is moving at a velocity of 5 meters per second (v = 5 m/s), the kinetic energy is equal to 125 Joules, or (1/2 * 10 kg) * 5 m/s2.

Answer:

The Kinetic energy of a 10Kg object moving with a speed of 5m/s is 125 Joules

Explanation:

Kinetic energy refers to the energy of a moving object. The formula for kinetic energy is given by

KE=(1/2)\(mv^{2}\).......(i)

, where, m⇒mass of object

             v⇒velocity

and the unit is given by Joules.

Now, as we are given in the question,

mass, m=10kg

velocity, v= 5m/s

Substituting these values in the equation (i), we get,

KE=(1/2)x(10Kg)x(5m/s)^2,

we have,

KE=125 J

Therefore, the kinetic energy of a 10 kg object moving with a speed of 5m/s is 125 Joules.

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The gases that make up the planet's atmosphere are mixed together.Nitrogen, oxygen, & carbon dioxide are among the atmospheric gases.The water cycle & weather depend on the atmosphere, which also sustains life.

The atmosphere of the earth shields its people by absorbing dangerous sun rays and preserving a constant temperature.It protects Earth from many space hazards and enables life there.As a result, it is crucial for regulating climate and a source of life on planet.

Approximately 78% of the air of Earth's atmosphere is nitrogen, while 21% is oxygen.In trace proportions, additional gases like carbon dioxide, neon, & hydrogen are also present in air.

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Answer:

1. The number of valence electrons that an atom has dictates its ability to react chemically. The closer an atom is to achieving a full outermost shell, the more likely it will be to borrow electrons. Atoms are paired in a way that allows both to achieve a full stable outermost shell. For example, one atom of silicon has 14 electrons, four of which are valence electrons in the outermost shell. Silicon can lend, share, or gain four electrons to achieve a full outermost shell.

2.

a. Law of conservation of energy

b. Law of definite proportions

c. Law of conservation of matter

3. Mendeleev first published a table of elements arranged according to increasing atomic masses. He noticed that some elements near each other had differing properties, but elements in vertical columns had similar properties. Moseley then rearranged the table according to atomic numbers and this eliminated the discrepancies found in Mendeleev’s attempt. Today’s version of the periodic table displays elements in order based on their atomic number; the atomic number indicates the number of protons within the atoms of a particular element. Rows are called periods and columns are called groups. Elements in the same group have similar properties. Elements are grouped into nine categories: noble gases, halogens, nonmetals, alkali metals, alkaline earth metals, transition metals, other metals, metalloids, and rare earth elements.

                     ( VIEW ATTACHMENT FOR 4, 5, AND 6.)

7. Water is colorless, odorless, and tasteless. It's the chief substance of living material. It has a specific gravity of 1.0 at 4° Celsius. It freezes at 0° Celsius and boils at 100° Celsius. Water is a powerful solvent. Distillation is needed to remove impurities. Purification methods include

Aeration (water is sprayed into the air so that light and oxygen can kill bacteria)

Filtration (water is passed through a filter to remove impurities)

Chlorination (chlorine is added to water to destroy bacteria)

Coagulation (chemicals are added to water to cause organic matter with bacteria to settle out)

8. Air contains nitrogen (78%), oxygen (21%), carbon dioxide (0.04%), and rare gases (less than 1%). It also contains water, dust, bacteria, and other materials.

The atmosphere supports life via two cycles. In the carbon dioxide cycle, carbon dioxide is taken in by plants and used in photosynthesis. From here, oxygen is released to the atmosphere and taken in by animals; it fuels combustion and is needed for fermentation and decay. These processes convert it back to carbon dioxide.

In the nitrogen cycle, nitrogen is fixed by bacteria in the soil into usable nitrogen compounds absorbed by plants. Plants use these to form proteins, which are used as food by animals. Decaying plants and animal wastes return the nitrogen to the soil and ammonia to air. Without atmospheric nitrogen, rust and decay of living material would happen more quickly.

Other characteristics that Nima can share with her students are as follows:

Visible light is one of the components of the electromagnetic spectrum (EM). It is the only part of the EM spectrum that is visible to human eyes.

According to this question, Nima has already shared this characteristics of visible light with her student.

Other characteristics that Nima can share with her students are as follows:

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